Beverly Sills, Lauren Bacall, Betty Comden and Phyllis Newman are among performers who will appear at a 70th birthday bash Aug. 25 for conductor Leonard Bernstein.

The Leonard Bernstein Gala Birthday Performance is to raise money for the Tanglewood Music Center, where Bernstein got his conducting start.The Boston Symphony Orchestra, the Boston Pops Orchestra and the Tanglewood Festival Chorus under the direction of conductors whose careers have been guided by Bernstein will perform. Sills will host.

Bacall and soprano Barbara Hendricks will perform a movement from Bernstein's Symphony No. 3, "Kaddish." Violin soloist Midori will play two movements from his "Serenade."

The concert will celebrate Bernstein's accomplishments in popular music with excerpts from "West Side Story," "On the Town" and others.

Tickets start at $20 for a spot on the lawn and run to $5,000 a seat in the open-air auditorium.